平硐溜井系统矿石运动状态及井壁破坏数值模拟  

Numerical Simulation on the Motion of Ore and the Damage of Shaft Wall in Chute System of an Adit

作　　者：叶海旺[1,2] 赵昀[1] 欧阳枧 雷涛[1,2] 王超[1] 龙梅[3] 

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [3]武汉理工大学图书馆,湖北武汉430070

出　　处：《金属矿山》2017年第11期18-22,共5页Metal Mine

基　　金：中央高校基本科研业务费专项(编号:2017IVA045;2017IVA046;2017-zy-071);湖北省自然科学基金青年基金项目(编号:2016CFB336);贵州省科技计划项目(编号:20172803)

摘　　要：在露天矿平硐溜井系统中,矿车卸下的矿石落入溜槽,运动一段时间后进入溜井,并在井壁上产生严重的冲击破坏。以华新钻沟石灰岩露天矿山为例,利用PFC^(2D)软件建立平硐溜井系统的数值模型,分析矿石的运动状态,以冲量为指标,研究溜井井壁的冲击破坏特性。研究结果表明:矿石从堆积形态逐渐发育成稳定矿石流后,矿石沿着溜槽滚动。矿石进入溜井后,初始碰撞位置比较固定,由于矿石间相互作用的影响,矿石后续运动状态比较复杂。初始碰撞位置距离井口5~10 m,破坏最大,需要重点防护,其他位置井壁的破坏相对较小。In the adit system of an open pit mine,the ore discharged from dump truck falls into the chute.After the ore is moving,the ore will flow into the shaft and severely damage the shaft wall.Taking the Huaxin limestone mine in Zuangou as an example,a numerical model of the adit is built to analyze the motion of ore by using PFC^（2D） software.Taking the momentum as an indicator,the damage characteristics on shaft wall are studied.The result shows： the ore with depositional shape are evolved into a steady ore stream at first,and move along with the chute.When the ore is finally rolled into the shaft,its initial collision position is relatively fixed.The later movement of the ore is complicated due to the interactions between the ore.The initial collision position is located at the right side of shaft wall in the range of 5 ~ 10 m from wellhead.This area needs to be well protected for its serious damage.The other parts of the shaft wall are relatively less damaged.

关 键 词：PFC2D 迟滞接触模型 运动状态 井壁破坏 

分 类 号：TD57[矿业工程—矿山机电]